When the shitcoin season ends all money will flow back into BTC, where they belong. Don't be tempted by fast huge gains because the risks are very high.
HODL because this year your gains in BTC will be huge! Hitting the $100K and beyond, the BTC holders are the smartest, to the Moon!
By buying altcoins with BTC, you can increase the amount of bitcoin in your wallet. I believe that I have very successfully exchanged my BTC for ETH, and now if I sell ethereum, I will get almost 3 times more BTC than it was before. But it is still too early to do this, while the altcoin season continues.
Honestly that is the reason why people are moving to altcoins and selling their bitcoins as well, most people at least. The reality is that bitcoin will not go 10x again, that is not possible from here, that would be over half a million dollars per bitcoin and let's be honest we are not going to reach that anytime soon, I am not saying that bitcoin won't go up, who knows maybe it will be 100k, or even 200k, that would be super high increase, but we all know that during the same period there are altcoins that could increase 10x even higher so that is why people prefer that instead.
It is going to take some time for people to realize the steadier big increase is always in bitcoin and altcoins go up and down a lot more volatile and it is risky, but since we are in a bull market everyone prefers that super high quick profit over what bitcoin can provide.